Non-invasive blood pressure determination method
First Claim
1. A method for estimating systolic blood pressure and diastolic blood pressure comprising:
- obtaining a pulse transit time slope from a patient;
providing previously acquired blood pressure data obtained from a plurality of different subjects to a processor, said previously acquired blood pressure data adapted to convey the manner in which a systolic amplitude ratio and a diastolic amplitude ratio vary with respect to the pulse transit time slope obtained from the patient;
implementing the previously acquired blood pressure data in the processor to select a systolic amplitude ratio and a diastolic amplitude ratio that most closely correlate with the pulse transit time slope obtained from the patient, wherein the selected systolic amplitude ratio and diastolic amplitude ratio are adapted to compensate for the effects of arterial compliance;
implementing the selected systolic amplitude ratio in the processor to estimate a systolic blood pressure level; and
implementing the selected diastolic amplitude ratio in the processor to estimate a diastolic blood pressure level.
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Abstract
A method for estimating systolic and diastolic pressure is disclosed herein. The method includes obtaining a predetermined type of blood pressure data from a patient, and providing previously acquired blood pressure data obtained from a plurality of different subjects. The method also includes implementing the previously acquired blood pressure data to select systolic and diastolic amplitude ratios that most closely correlate with the predetermined type of blood pressure data obtained from the patient. The selected systolic and diastolic amplitude ratios are adapted to compensate for the effects of arterial compliance. The method also includes implementing the selected systolic and diastolic amplitude ratios to generate a systolic and diastolic blood pressure estimates.
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Citations
19 Claims
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1. A method for estimating systolic blood pressure and diastolic blood pressure comprising:
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obtaining a pulse transit time slope from a patient; providing previously acquired blood pressure data obtained from a plurality of different subjects to a processor, said previously acquired blood pressure data adapted to convey the manner in which a systolic amplitude ratio and a diastolic amplitude ratio vary with respect to the pulse transit time slope obtained from the patient; implementing the previously acquired blood pressure data in the processor to select a systolic amplitude ratio and a diastolic amplitude ratio that most closely correlate with the pulse transit time slope obtained from the patient, wherein the selected systolic amplitude ratio and diastolic amplitude ratio are adapted to compensate for the effects of arterial compliance; implementing the selected systolic amplitude ratio in the processor to estimate a systolic blood pressure level; and implementing the selected diastolic amplitude ratio in the processor to estimate a diastolic blood pressure level. - View Dependent Claims (2, 3, 4, 5)
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6. A method for estimating systolic blood pressure and diastolic blood pressure comprising:
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providing a non-invasive blood pressure monitor comprising a cuff configured to apply a selectable pressure level to a patient; estimating a first pulse transit time in a processor at a first cuff pressure level, and estimating a second pulse transit time in the processor at a second cuff pressure level; calculating a pulse transit time ratio in the processor defined as the first pulse transit time divided by the second pulse transit time; providing blood pressure data in the processor adapted to correlate a plurality of pulse transit time ratios with a plurality of systolic amplitude ratios and a plurality of diastolic amplitude ratios; selecting one of the plurality of systolic amplitude ratios and one of the plurality of diastolic amplitude ratios that most closely correlate with the calculated pulse transit time ratio, wherein the selected systolic amplitude ratio and the selected diastolic amplitude ratio are adapted to compensate for the effects of arterial compliance; implementing the selected systolic amplitude ratio in the processor to estimate a systolic blood pressure level; and implementing the selected diastolic amplitude ratio in the processor to estimate a diastolic blood pressure level. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A method for estimating systolic blood pressure and diastolic blood pressure comprising:
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estimating a pulse wave velocity in a processor of a pulse being transmitted through a patient; providing blood pressure data in the processor adapted to correlate a plurality of pulse wave velocity values with a plurality of systolic amplitude ratios and a plurality of diastolic amplitude ratios; selecting one of the plurality of systolic amplitude ratios and one of the plurality of diastolic amplitude ratios that are most closely correlated with the estimated pulse wave velocity, wherein the selected systolic amplitude ratio and the selected diastolic amplitude ratio are adapted to compensate for the effects of arterial compliance; implementing the selected systolic amplitude ratio in the processor to estimate a systolic blood pressure level; and implementing the selected diastolic amplitude ratio in the processor to estimate a diastolic blood pressure level. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification